656125136 has 10 divisors (see below), whose sum is σ = 1271242482. Its totient is φ = 328062560.

The previous prime is 656125109. The next prime is 656125139. The reversal of 656125136 is 631521656.

656125136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 573315136 + 82810000 = 23944^2 + 9100^2 .

It is a junction number, because it is equal to n+sod(n) for n = 656125096 and 656125105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656125139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20503895 + ... + 20503926.

Almost surely, 2^656125136 is an apocalyptic number.

It is an amenable number.

656125136 is a deficient number, since it is larger than the sum of its proper divisors (615117346).

656125136 is a wasteful number, since it uses less digits than its factorization.

656125136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41007829 (or 41007823 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 656125136 is about 25614.9397032279. The cubic root of 656125136 is about 868.9515427300.

The spelling of 656125136 in words is "six hundred fifty-six million, one hundred twenty-five thousand, one hundred thirty-six".